Cylinder-mold drive.



No. 676,492. l Patented .lune I8, I90l.

, B. B. FARNHAM.

CYLINDER MOLD DRIVE.

(Application med mr. e, 1901.)

(N0 Mndel.)

mai-255231 J S. @ich un am Mm. I i BB Xus 0:35.

UNITED STATES:

.PATENT BION B. FARNHAM, OF OASTLETON, NEW YORK.

CYLINDER-MOLD DRIVE.

SPECIFICATION forming part of Letters Patent N o. 676,492, dated. June18, 1901. Application filed March 6, 1901. Serial No. 50,071.' (Nomodel.)

T0 all whom, it may concern.:

Be it known that I, BION B. FARNHAM, a citizen of the United States,residing at Oastleton, New York, have invented certain new and usefulImprovements in Cylinder-Mold Drives; and I do hereby declare thefollowing to be a full, clear, and exact description of the invention,such as will enable others skilled in the art to which it appertains tomake and use the same, reference being had to the accompanying drawings,and to the Iigures of reference marked thereon, which form a part ofthis specification.

The object ofmy invention is to provide a new and improved cylinder-molddrive, more especially for paper-making machines.

In the drawings, Figure 1 shows an end elevation of one ofthe cylindersin its vat with the couch-roll and felt web and a vertical sectionalview of the drive suspended overhead, and Fig. 2 a similar View ofanother form of my drive.

My invention relates to what is known in a paper-mill as a cylinder-molddrive, the

cylinder-mold,with its couch-roll and felt web,v

being shown set in the tank 20 in Fig. 1 and at 20 in Fig. 2. The driveis preferably suspended overhead by brackets 14. The cylinder-mold 2lrevolves in the pump-vat 20 and picks up the pulp and as it revolvescarries it under the felt web 23, which acts as a belt about thecouch-roll 22 and presses the extra moisture inthe pulp ont,which passesthrough the meshes in cylinder-mold 21, which is a wire-screen cylinder,preferably, the felt web 23 being operated by passing over a rotatingdrum, (not seen,) as is usual in paper-mills, the web picking up theforming sheet of paper and carrying it to its destination. To the shaftof the cylinder-mold 21 I have attached the sprocket wheel 17 and also aratchet-wheel 19, and a dog 18 is attached to the wheel 17, so that anybackward movement of the ratchet-wheel 17 will cause the ratchet 1S toengage with teeth on the ratchetwheel17. Otherwise the ratchet slidesover the teeth. The drive consists of a drivingbelt 1, which revolvesthe cone pulley 2, and this revolves the small gear 3. Gear 3 mesheswith gear-wheel 4, which is fastened or keyed to the hub of gear-wheel5, running loose on the shaft 15, and its teeth mesh with those on thepinion 6, which is rotatable about a pin attached to the arm 10, asshown. Pinion 6 meshes with the internal teeth of a wheel 7, which ismade fast on the shaft 15 and gives the shaft revolution. On the hub ofgear-wheel 5 is a loose-running collar 11, having an arm 10 and anadjustable weight 9 thereon and a belt-shifting rod 12, pivoted to earsthereon and carrying a fork 13 13, in which the belt 1 rests and runs.On the shaft l5 is also a sprocket-wheel 8, made fast thereto andcarrying'a sprocket-chain 16, which passes to and engages with thesprocketwheel 17. The power that moves shaft 15 and sprocket wheel 17may therefore be traced through belt 1, cone-pulley 2, gear 3,gear-Wheel Il, hub and gear-wheel 5, pinion 6, internal-toothedgear-wheel 7, to shaft 15, to sprocket-wheel17, and any variationbetween the speed or pull of cylinder-mold 21 and web 23 and that of thedrive will communicate a lateral swing to the arm 10, which will partlyrotate collar 11 and cause belt-shiftin g rod 12 to move, thus shiftingbelt 1 over the surface of cone-pulley 2, thus increasing or decreasingthe speed of the drive and keeping the speed of the cylinder-mold 2l andthat of the web 23 practically uniform, and this is necessary, aswithout a cylinder-drive the only motion given that cylinder was by themovement of web 23, and any irregularity in the movement of that webcaused by its slipping or stretching or from any other cause would putan extra stress upon the forming sheet of paper carried by the web, andan imperfect sheet of paper would be the result.

Vith my drive attached to the cylindermold the operation is as follows:The drive is set at the start to transmit to the sprocketwheel 17, andtherefore to the cylinder-mold 21, a rotation equal to and in unisonwith the motion of web 23, so that as the web 23 passes between thecylinder-mold 21 and couch-roll 22 there is no longitudinal stress putupon the web, and the only effect upon the web is the pressure caused bycouch-rol122. As the web picks up and carries the paper and it issqueezed between the cylinder-mold 21 and web 23 an extra stress may beput upon the web, or if the web by considerable use is made thin inspots or for any other reason it does not move with a uniform speed, and

IOO

thus make a uniform pull on cylinder-mold 21, thus causing an imperfectsheet of paper to be formed, the increase or decrease of the webs pull,whichever the case may be, will result in a tendency to either slow upthe motion of the drive on account of the eXtra pull or to let it runfaster on account of the decrease of the normal pull of the web 23, andas the drive attempts to slow up against the eXtra pull of the webpinion 6 will roll forward over the teeth of gear-wheels and 7 and movearm 10 and Weight 9 forward, which will move belt-shifter 12 and fork 13and also belt 1 forward and farther down the inclined face ofcone-pulley 2, which will decrease the speed or force of the driveprecisely enough to cause cylinder-mold 21 to rotate enough slower torelieve the strain on web 23, and in case there is any slip of web 23 orits pull on cylinder-mold 21 is' reduced the arm 10 and belt-shifterwill automatically recede and draw the belt l farther upon -thecircumference of the conc-pulley 2, and

the cylinder-mold will take up increased speed and the motion of the web23 and cylinder-mold 2l will be kept uniform and the forming sheet ofpaper carried by the web will be uninjured.

In Fig. 2 I show another form of my device, in which the shaft receivesmotion from cone-pulley 25 through shaft 24. Gear- Wheel 2G is fast tothe shaft l5', and gearwheel 27 is loose on the shaft. Between them isthe collar 28, loose on the shaft, having an arm 33, also acting as ajournal for small gear 3l, the arm 33 having an adjustable'weight 32.Collar 28 also has a pivoted arm 29, pivoted to ears on the collar, asseen, to allow of motion preferably at the point of lixture, andattached to arm 29 is a bell-crank 30, its outer link having a fork 30',so that when the fork is moved in a direction transverse the belt itwill move the belt up or down the cone-pulley 25. 20 shows the vat, 2lthe cylinder-mold, 22 the conch-roll, and 23 the felt web, of theordinary paper-making machine. To the journal of the cylinder-mold isattached the sprocket-wheel 17 and ratchet-wheel 19 and a ratchet 18',all operating similarly to the same parts shown in Fig. 1. As the web23' moves over and drives couch-roll 22' the friction on cylindermold 21rotates that cylinder. Any variation in the pull of the web 23', eitheran increase or decrease, will be communicated to the sprocket-chain andto sprocket-Wheel 34: and gear-wheel 26, which will cause pinion 3l totravel forward or backward, and as it does so collar 2S is partlyrevolved, which throws arm 29 out or draws it in, as the case maybe,when the bell-crank will be operated so as to move the fork 30 up ordown, and thus move the belt up or down the face of the cone-pulley 25,which will alter the speed of the drum, so as to causeit to makecylindermold 21 to lnove in unison with t-he web 23' and prevent anydamage to the forming sheet of paper.

The weights 9 in Fig. l and 32 in Fig. 2 are made adjustable on the rodsthat carry them in order that they may at the start be given exactly theposition on the rods that will canse their weight to connterbalance thenormal pull on the web and hold the pinion 6 in Fig. 1 and the' smallgear in Fig. 2' in one p0- sition, but to allow them to travel back andforth when necessary.

My device may be applied to any similar moving piece of mechanism, and Itherefore do not confine myself to its operation with a cylinder-mold.It will be seen, therefore, that my cylinder-mold is in fact operated bya plurality of powers each separatel from the other-that is, by thepower of the moving web and also by the power of the belt l-and Icounterbalance the one power against the other to make a shifting powerto accommodate itself to any unevenness in the movements of the web. V

What I claim, therefore, is:-

1. In a driving mechanism for a cylindermold and other machinesa shaft,a sleeve loosely mounted thereon, means for driving said sleevecomprising a. friction-cone and belt,'a gear fixed to the sleeve, aweighted pivotally-mounted arm for shifting said belt, a pinion carriedby said arm and meshing with said gear and an internal gear meshing withthe pinion and fixed to said shaft, snbstantially as described.

2. A speed-governor comprising a shaft, gears mounted thereon, apivotally-mounted weighted arm, a pinion carried thereby and engagingsaid gears, means for driving one of said gears comprising afriction-cone and belt, and means connected to said arm for shifting thebelt as the tension upon the shaft is varied substantially as described.

In testimony whereof I affix my signature in presence of two witnesses.

B. B. FARNHAM.

\Vitnesses:

W. M. BROWN, JAMES M. BROWN.

